CN103929751B - Method and device for determining pair of cells located in different networks and covering same area - Google Patents

Abstract

An embodiment of the present invention provides a method and device for determining a cell pair covering a common area in different networks. The method includes: according to the basic information of each cell in the first network and the second network, respectively The coverage area of each cell in the network; for each cell in the first network, according to the coverage area of the cell and the collected time advance statistical data of the cell, calculate the common Coverage degree value; the calculated coverage cell with the largest common coverage degree value forms a cell pair covering a common area with the cell in the first network and outputs it. In the embodiment of the present invention, according to the basic information of each cell in different networks, the coverage area of these cells can be estimated first, and then according to the statistical data such as the time advance of these cells, the pair of cells covering the common area in different networks can be accurately determined. .

Description

A method and device for determining a cell pair covering a common area in different networks

technical field

The invention relates to the technical field of mobile communication, in particular to a method and a device for determining cell pairs covering a common area in different networks.

Background technique

With the popularization of smart mobile terminals and the continuous growth of packet data services, operators' second-generation mobile communication networks have gradually become saturated, and at the same time, the scale of third-generation mobile communication networks continues to expand. Under this situation, the current Operators usually operate these two mobile communication networks at the same time. Then, in such an environment with different network coverage, in order to reasonably schedule network resources, reduce operating costs and ensure users have a better service experience, operators often obtain some statistical data through various channels, such as from the network management system, Service support system, signaling monitoring system, etc., to obtain cell information covering common areas in different networks (this information is the basic information for collaborative operation between different networks), which is convenient for carrying out correlation analysis between different networks, Scheduling etc.

At present, the following two methods are usually used to obtain cell information covering a common area in different networks:

The first method: analyze the drive test data under different networks to obtain the information of the cells covering the same area in different networks, specifically, adopt the method of manual field test, for example, use two mobile terminal, and move along a predetermined route, respectively record the signal strength of the mobile terminal under different networks, and then form the drive test data reflecting the actual coverage of different networks according to the model selection network information of the mobile terminal for subsequent analysis.

The second method: analyze the statistical data of communication events in different networks to obtain cell information covering common areas in different networks, for example, according to the base station controller (BSC) in the GSM system or the wireless network in the third-generation mobile communication network According to the number of handovers between the cells counted by the controller (RNC), if the number of handovers between the cell a in the A network and the cell b in the B network is large, then the cell a and the cell b are considered to be the same Groups cover pairs of cells in a common area.

From the above two acquisition methods, it can be seen that if the first method is used, it is generally necessary to follow a predetermined route. This test method cannot cover the entire area of different networks, so that the acquired cell information covering the same area in different networks is not accurate. The accuracy is poor; if the second method is used, for example, according to the number of handovers, it can only be judged that the two cells have a neighbor relationship, but it cannot be determined whether the two belong to cells covering a common area, or just belong to border neighbors In addition, this method cannot avoid the situation that the number of handovers is not counted due to the fact that the neighbor relationship is not configured in the communication device, thus ignoring the coverage of the common area between the two cells, which makes the acquired coverage of the common area in different networks The accuracy of cell information is still poor.

Contents of the invention

Embodiments of the present invention provide a method and device for determining a pair of cells covering a common area in different networks, so as to solve the existing problem of poor accuracy in obtaining cells covering a common area in different networks.

Based on the above problems, an embodiment of the present invention provides a method for determining cells covering a common area in different networks, including:

According to the basic information of each cell in the first network and the second network, respectively estimate the coverage area of each cell in the first network and the second network, the basic information includes the location information of each cell in the first network and the second network, Antenna azimuth and transmit power;

For each cell in the first network, according to the coverage area of the cell and the collected time advance statistical data of the cell, the common coverage value between the cell and each coverage cell is calculated, and each coverage cell is A cell in an overlapping area with the coverage area of the cell in the second network;

The calculated coverage cell with the largest value of the common coverage degree forms a cell pair covering the common area with the cell in the first network and outputs it.

A device for determining a cell pair covering a common area in different networks provided by an embodiment of the present invention includes:

The coverage area estimation module is used to estimate the coverage area of each cell in the first network and the second network respectively according to the basic information of each cell in the first network and the second network stored in the basic information storage module, the basic information includes the first location information, antenna azimuth and transmit power of each cell in the first network and the second network;

The common coverage degree calculation module is used to calculate the distance between the cell and each covered cell according to the coverage area of the cell and the time advance statistical data of the cell collected by the data collection module for each cell in the first network. The value of the common coverage degree, each coverage cell is a cell in the second network that overlaps with the coverage area of the cell;

An output module, configured to form a cell pair covering a common area with the cell in the first network with the calculated coverage cell having the largest common coverage value and output the result.

The beneficial effects of the embodiment of the present invention include: a method and device for determining a cell pair covering a common area in different networks provided by the embodiment of the present invention. In this method, firstly, the cells in the first network and the second network Based on basic information such as location information, antenna azimuth angle and transmit power, etc., the coverage areas of the cells in the first network and the second network are estimated respectively; then for each cell in the first network, the coverage area and The collected statistical data such as the time advance of the cell are used to calculate the common coverage value between the cell and each coverage cell (here, the coverage cell refers to the presence of the coverage area of the cell in the second network) Cells in the overlapping area); finally, the calculated coverage cell with the largest common coverage value and the cell in the first network form a pair of cells covering the common area and output it. In the embodiment of the present invention, when estimating the coverage area of each cell in different networks, it is estimated based on the antenna azimuth angle, transmission power and other information of these cells, and the estimation result is closer to the actual coverage of the cells in different networks In this way, the output cell pairs covering the common area are more accurate, which facilitates the coordinated operation of cells under different networks; and when calculating the value of the common coverage between cells under different networks, the timing advance of the cells, etc. Statistical data, so that when comparing the common coverage between two cells in different networks, not only the area covered by the common area is measured, but also the service distribution weight of the two covered common areas is measured based on statistical data such as time advance. The resultant service correlation of cell pairs covering a common area is closer.

Description of drawings

FIG. 1 is a flowchart of a method for determining a cell pair covering a common area in different networks provided by an embodiment of the present invention;

FIG. 2 is a flow chart of estimating the coverage cells of each cell in the first network provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a first coverage area of the cell provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a second coverage area of the cell provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of the current coverage area of the cell provided by the embodiment of the present invention;

FIG. 6 is a schematic diagram of the coverage area of the cell provided by the embodiment of the present invention;

FIG. 7 is a schematic diagram of the area of each sub-area in the coverage area of the cell provided by an embodiment of the present invention;

FIG. 8 is a schematic diagram of a cell covering a common area with the cell provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an apparatus for determining cell pairs covering a common area in different networks provided by an embodiment of the present invention.

detailed description

The existing way to obtain cell information covering common areas in different networks is usually to obtain cell information covering common areas in different networks based on drive test data under different networks; or to obtain information based on communication event statistics in different networks, However, no matter which method is adopted, the obtained cells covering the common area are not accurate enough. Based on this problem, the embodiments of the present invention provide a method and device for determining cell pairs covering a common area in different networks. The coverage areas of these cells can be estimated according to the basic information of each cell in different networks, and then based on the cell pairs of these cells Statistical data such as timing advance can accurately determine cell pairs covering a common area in different networks.

The specific implementation manners of a method and an apparatus for determining cells covering a common area in different networks provided by the embodiments of the present invention will be described below with reference to the drawings in the description.

A method for determining a cell pair covering a common area in different networks provided by an embodiment of the present invention can be applied to a variety of network coverage scenarios, and is not limited to the first network and the second network mentioned below, but in For example, when multiple networks include two or more different networks, when determining cell pairs covering a common area, first divide these networks into several groups, each group includes two networks, and then use the following method to determine. For example, in the scenario where network A, network B, and network C are covered, they can be divided into three groups to determine one by one (that is, group 1: network A and network B; group 2: network A and network C; group 1: network A and network C; 3 groups: B network and C network).

As shown in FIG. 1, the method for determining a cell pair covering a common area in different networks provided by an embodiment of the present invention specifically includes the following steps:

S101: According to the basic information of each cell in the first network and the second network, respectively estimate the coverage area of each cell in the first network and the second network;

Here, the foregoing basic information may include location information, antenna azimuth angles, and transmit power of each cell in the first network and the second network, for example, the location information may include latitude and longitude information of base stations to which each cell belongs;

S102: For each cell in the first network, according to the coverage area of the cell and the collected time advance statistical data of the cell, respectively calculate the common coverage value between the cell and each coverage cell;

Here, each coverage cell actually refers to a cell that overlaps with the coverage area of the cell in the second network. These coverage cells can be found from the cells of the second network in an existing way. The detailed search process is in This will not be described in detail;

S103: Form a cell pair covering a common area with the cell in the first network with the calculated coverage cell having the largest common coverage value, and output it.

Preferably, in the above step S101, as shown in FIG. 2, the coverage area of each cell in the first network can be estimated through the following process:

S201: For each cell in the first network, determine the coverage radius of the cell according to the corresponding relationship between the transmission power of the cell and the coverage radius, and use the position of the antenna of the cell as the center of the circle and the coverage radius as the radius. The formed circular area is estimated as the first coverage area of the cell;

S202: Determine whether there is a cell that shares a base station with the cell, if yes, execute step S203; if not, execute step S204;

S203: From the cells that share the base station with the cell, determine the first type of neighboring cells of the cell according to the first preset condition, and according to the antenna azimuth angle between the cell and each of the first type of neighboring cells and the first coverage area, obtaining the second coverage area of the cell;

S204: Determine that there is no change in the first coverage area of the cell, and proceed to step S205;

S205: From the set of cells that do not share the same base station with the cell, determine the second type of neighboring cells of the cell according to the second preset condition, and according to the transmit power of the cell and each neighboring cell in the second type of neighboring cells, and the first The first coverage area or the second coverage area is used to obtain the coverage area of the cell.

Preferably, in the above step S201, taking cell _A0 in network A (the first network) as an example, the corresponding relationship between the transmit power of cell _A0 and the coverage radius can be calculated using existing known calculation models or simplified models Obtained, can determine the maximum coverage radius R _A0 of this sub-district according to this corresponding relationship and draw a circle, specifically, the circular area formed with the antenna location of the sub-district _A0 as the center and the radius R _A0 as the first coverage area (That is, the initial coverage area, the shaded part shown in Figure 3).

Preferably, in the above step S203, the first preset condition can be realized in the following manner:

For each cell in the first network, select the cell corresponding to the antenna azimuth angle with the smallest angle formed by the antenna azimuth angle of the cell in the clockwise and counterclockwise directions from the cells that share the base station with the cell , and take it as the first type of neighboring cell of the cell.

Here, the first preset condition is not limited to the above-mentioned implementation manner, and of course, other conditions may also be used to select the first-type neighboring cells of the cell, which will not be listed here.

Further, in the above step S203, the second coverage area of the cell can be obtained through the following process:

Taking the location of the antenna of the cell as the endpoint, determine the first ray and the second ray along the direction of the angle bisector of the angle between the antenna azimuth angle between the cell and each adjacent cell of the first type, respectively;

The fan-shaped area formed by the first ray, the second ray, and the first coverage area is used as the second coverage area of the cell. Here, the fan-shaped area is actually the area containing the ray along the antenna azimuth direction of the cell.

Still taking the above-mentioned cell A ₀ as an example, assuming that the antenna azimuth angle of cell A ₀ is ∠A ₀ , and the antenna azimuth angle of the clockwise neighboring cell is ∠A _adj1 , so the angle between them is Angle(∠A ₀ ,∠A _adj1 ), the antenna azimuth angle ∠A _adj2 of the counterclockwise adjacent area, so that the angle between them is Angle(∠A ₀ ,∠A _adj2 ). Then, taking the antenna location of cell A ₀ as the end point, deflect clockwise along ∠A ₀ by 1/2Angle(∠A ₀ ,∠A _adj1 ) to determine the first ray, that is to say, along the cell and the clockwise adjacent The direction of the angle bisector of the included angle of the antenna azimuth angle of the area is determined; the second ray is determined by deflecting 1/2Angle (∠A ₀ ,∠A _adj2 ) counterclockwise along ∠A ₀ The direction of the angle bisector of the included angle of the antenna azimuth angle of the area is determined. In this way, the fan-shaped area formed by the two rays and the first coverage area of the cell A ₀ , which includes the ray along the direction of the antenna azimuth angle of the cell, is used as the cell The second coverage area of A ₀ (the shaded part shown in FIG. 4 ).

Preferably, in the above step S205, the second preset condition can be realized in the following manner:

For each cell in the first network, calculate the distance and the sum of the coverage radius between the cell and the base station of each cell in the cell set not sharing the base station with the cell;

From the set of cells that do not share a base station with the cell, select a cell whose distance from the base station to which the cell belongs is smaller than the sum of coverage radii of the cell, and use it as the second type of neighboring cell of the cell.

Here, still taking cell A ₀ as an example, the cells whose distance to the base station of cell A ₀ is less than the sum of the coverage radii of cell A ₀ can be marked as cell N ₁ , cell N ₂ ... cell N _n . In addition, the above-mentioned second preset condition is not limited to the above-mentioned implementation manner, and of course the second-type neighboring cells of the cell can also be selected through other conditions, which will not be listed here.

Further, in the above step S205, the coverage area of the cell is obtained through the following process:

For each cell in the first network, on the connection line between the cell and the antenna position of each adjacent cell in the second type of adjacent cell, according to the transmit power of the cell and each adjacent cell in the second type of adjacent cell , calculate the point at which the received signal strength of the terminals on each connection is equal, and pass through this point to make a vertical line of the connection line where the point is located;

In the case where each vertical line intersects with the first coverage area or the second coverage area, the area formed by each vertical line with the first coverage area or the second coverage area and close to the antenna position of the cell is taken as the coverage of the cell area.

In this process, on the connection line between the cell and the antenna position of each cell in the second type of adjacent cell, according to the ratio of the transmission power of the cell to each adjacent cell in the second type of adjacent cell, The point at which the received signal strengths of the terminals on the connection are equal may also be calculated according to the ratio of the square of the transmit power of the cell to that of each neighboring cell in the second type of neighboring cell. Of course, it can also be calculated in other ways, which will not be enumerated here.

Still taking cell A ₀ as an example, assuming that its second-type neighboring cells are cell N ₁ , cell N ₂ ... cell N _n , then, for cell N ₁ , it is assumed that the antennas of cell A ₀ and cell N ₁ are located On the connection between the positions, the point where the received signal strength of the terminal is calculated to be equal is X, then, a vertical line of the connection is made along this point X, if this vertical line intersects the first coverage area or the second coverage area , then this vertical line forms two areas with the first coverage area or the second coverage area, and the area close to the location of the antenna of cell A ₀ is regarded as the area formed by this vertical line with the first coverage area or the second coverage area and close to The area of the antenna location of the cell (the shaded part shown in FIG. 5 ).

For other cells N ₂ ... cell N _n , repeat the above procedure to obtain the area formed by each vertical line and the first coverage area or the second coverage area and close to the antenna position of the cell, and use it as the coverage of the cell area (the shaded part shown in Figure 6).

For each cell in the second network, the manner of estimating the coverage area of each cell in this network is the same as that of each cell in the first network, and will not be repeated here.

Preferably, in the above step 102, the common coverage value between the cell and each coverage cell is calculated through the following process:

According to the time advance statistical data of the sub-district in the collected first network, the coverage area of the sub-district is divided into a plurality of sub-regions, and the area of each sub-region is calculated; here, each sub-region represents the corresponding time advance statistical data the distance interval;

According to the formula W _i =all user sampling points in each sub-area/all user sampling points in the coverage area of the cell, calculate the traffic distribution weight of each sub-area, where W _i is the traffic distribution weight of each sub-area;

Calculate the coverage area of each coverage cell and the overlapping area of each sub-area in the coverage area of the cell, and use the following formula to calculate the common coverage value between the cell and each coverage cell:

Wherein, C(A _x , B _y ) is the common coverage value between the cell A _x and each covered cell B _y ;

Area(S _i , B _y ) is the area of the overlapping area between the coverage area of each coverage cell B _y and each sub-area S _i in the coverage area of the cell A _x ;

Area(S _i ) is the area of each sub-area S _i in the coverage area of the cell A _x .

In this process, these timing advance statistical data can be collected by the base station controller or radio network controller, still taking cell A ₀ as an example, assuming that its coverage cell is cell B ₁ , cell B ₂ ... in network B Cell B _n can be divided into several sub-regions with different distances according to the distance represented by the time advance statistical data of cell A ₀ , such as sub-regions S ₁ , S ₂ ... S _n (as shown in Figure 7), The area of each sub-region may be Area(S ₁ ), Area(S ₂ )...Area(S _n ). Here, calculating the area of the sub-region is a prior art, and will not be described in detail here.

Then, for cell A ₀ and cell B ₁ , the area Area(S ₁ , B ₁ ) of the overlapping area of each sub-region in cell B ₁ and cell A ₀ is first calculated using the existing area algorithm, and then using Calculate the common coverage value of cell B ₁ and cell A ₀ ; then use the same calculation method to calculate cell B ₂ ... cell B _n sequentially, and after all the calculations of all overlapping cells are completed, select the cell with the largest common coverage value ( Suppose it is cell B ₁ , as shown in the shaded part in Figure 8), and cell A ₀ forms a pair of cells covering a common area, and this result can be output in a certain type of file format, or output to The external system can also be presented in an intuitive way such as a map, and will not be listed here.

Based on the same inventive concept, an embodiment of the present invention also provides a device for determining cell pairs covering a common area in different networks, because the principle of the problem solved by the device is similar to the aforementioned method for determining cell pairs covering a common area in different networks , so the implementation of the device can refer to the implementation of the aforementioned method, and the repetition will not be repeated.

The device for determining a cell pair covering a common area in different networks provided by an embodiment of the present invention, as shown in FIG. 9 , specifically includes:

The coverage area estimation module 901 is configured to estimate the coverage area of each cell in the first network and the second network respectively according to the basic information of each cell in the first network and the second network stored in the basic information storage module 902, the basic information includes the first location information, antenna azimuth and transmit power of each cell in the first network and the second network;

The common coverage calculation module 903 is configured to, for each cell in the first network, calculate the coverage area of the cell and the statistical data of the timing advance of the cell collected by the data collection module 904, respectively calculate the coverage of the cell and each cell in the first network. A common coverage value between cells, each covered cell is a cell in the second network that overlaps with the coverage area of the cell;

The output module 905 is configured to form a cell pair covering a common area with the cell in the first network with the calculated coverage cell having the largest common coverage value and output the result.

Preferably, the above-mentioned coverage area estimation module 901 is specifically configured to, for each cell in the first network, determine the coverage radius of the cell according to the corresponding relationship between the transmit power of the cell and the coverage radius, and use the cell's The circular area formed by the location of the antenna as the center of the circle and the coverage radius as the radius is estimated as the first coverage area of the cell; The first preset condition determines the first type of neighboring cells of the cell, and obtains the second coverage area of the cell according to the antenna azimuth angle between the cell and each neighboring cell in the first type of neighboring cells and the first coverage area; from In the concentration of cells that do not share the same base station with the cell, the second type of neighboring cells of the cell are determined according to the second preset condition, and according to the transmission power of the cell and each neighboring cell in the second type of neighboring cells, and the first coverage area or the second coverage area to obtain the coverage area of the cell; for each cell in the second network, obtain the coverage area of each cell in the second network in turn according to the estimation method of each cell in the first network.

Preferably, the above-mentioned coverage area estimation module 901 is specifically configured to, for each cell in the first network, select the clockwise and counterclockwise antenna azimuths of the cell from the cells that share the base station with the cell. The cells corresponding to the antenna azimuth angles with the smallest included angles are taken as the first type of neighboring cells of the cell.

Preferably, the above-mentioned coverage area estimation module 901 is specifically configured to take the location of the antenna of the cell as the endpoint, and respectively follow the direction of the angle bisector of the antenna azimuth angle between the cell and each neighboring cell in the first type of neighboring cell , determine the first ray and the second ray; use the fan-shaped area formed by the first ray, the second ray, and the first coverage area as the second coverage area of the cell, and the fan-shaped area includes the antenna azimuth direction along the cell The area of the ray being made.

Preferably, the above-mentioned coverage area estimation module 901 is specifically configured to, for each cell in the first network, separately calculate the distance and coverage The sum of the radii; from the set of cells that do not share the base station with the cell, select a cell whose distance from the base station to which the cell belongs is smaller than the sum of the coverage radius of the cell, and use it as the second type of neighboring cell of the cell.

Preferably, the above-mentioned coverage area estimation module 901 is specifically configured to, for each cell in the first network, on the connection line between the cell and the antenna position of each neighboring cell in the second type of neighboring cells, according to the Calculate the point at which the received signal strength of the terminal on each connection line is equal to the transmit power of each neighboring cell in the second type of neighboring cell, and make a vertical line passing through the point; if each vertical line and the first If the first coverage area or the second coverage area intersects, the area formed by each vertical line with the first coverage area or the second coverage area and close to the antenna position of the cell is taken as the coverage area of the cell.

Preferably, the common coverage calculation module 903 is specifically configured to divide the coverage area of the cell into a plurality of sub-areas according to the collected time advance statistical data of the cell in the first network, and calculate the Area, each sub-area represents the distance interval corresponding to the time advance statistical data; according to the formula W _i = all user sampling points in each sub-area/all user sampling points in the coverage area of the cell, calculate the traffic distribution weight of each sub-area , where W _i is the traffic distribution weight of each sub-area; calculate the coverage area of each coverage cell and the overlapping area of each sub-area in the coverage area of this cell, and use the formula Among them, C(A _x ,B _y ) is the common coverage value between the cell A _x and each coverage cell B _y ; Area(S _i ,B _y ) is the coverage area of each coverage cell B _y and the coverage area of the cell B y The area of the overlapping area of each sub-area S _i in the coverage area of the cell A _x ; Area(S _i ) is the area of each sub-area S _i in the coverage area of the cell A _x .

Further, the above-mentioned device may also include:

The map presentation module 906 is configured to present cell pairs covering a common area in different networks in an intuitive manner such as a map.

The embodiments of the present invention provide a method and device for determining a pair of cells covering a common area in different networks. In this method, firstly, the location information, antenna azimuth and emission Power and other basic information to estimate the coverage area of each cell in the first network and the second network respectively; then for each cell in the first network, the coverage area of the cell and the collected timing advance of the cell and other statistical data to calculate the common coverage value between the cell and each coverage cell (herein, the coverage cell refers to a cell in the second network that overlaps with the coverage area of the cell); finally, the The calculated coverage cell with the largest value of the common coverage degree forms a pair of cells covering the common area with the cell in the first network and outputs it. In the embodiment of the present invention, when estimating the coverage area of each cell in different networks, it is estimated based on the antenna azimuth angle, transmission power and other information of these cells, and the estimation result is closer to the actual coverage of the cells in different networks In this way, the output cell pairs covering the common area are more accurate, which facilitates the coordinated operation of cells under different networks; and when calculating the value of the common coverage between cells under different networks, the timing advance of the cells, etc. Statistical data, so that when comparing the common coverage between two cells in different networks, not only the area covered by the common area is measured, but also the service distribution weight of the two covered common areas is measured based on statistical data such as time advance. The resultant service correlation of cell pairs covering a common area is closer.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (10)

1. A method for determining cell pairs covering common areas in different networks, characterized in that, comprising: According to the basic information of each cell in the first network and the second network, respectively estimate the coverage area of each cell in the first network and the second network, the basic information includes the location information of each cell in the first network and the second network, Antenna azimuth and transmit power; For each cell in the first network, according to the coverage area of the cell and the collected time advance statistical data of the cell, calculate the common coverage value between the cell and each coverage cell, each coverage cell being a cell in the second network that overlaps with the coverage area of the cell; forming a cell pair covering a common area with the cell in the first network with the calculated coverage cell having the largest common coverage value; and outputting the cell pair; According to the basic information of each cell in the first network and the second network, respectively estimating the coverage area of each cell in the first network and the second network specifically includes: For each cell in the first network, the coverage radius of the cell is determined according to the corresponding relationship between the transmit power of the cell and the coverage radius, and the location of the antenna of the cell is taken as the center of the circle and the coverage radius is used as the radius. The formed circular area is estimated as the first coverage area of the cell; If there is a cell that shares a base station with the cell, determine the first type of neighboring cells of the cell from the cells that share a base station with the cell according to the first preset condition, and The antenna azimuth angle of each neighboring cell and the first coverage area are obtained to obtain the second coverage area of the cell; From the set of cells that do not share the same base station with the cell, determine the second type of neighboring cells of the cell according to the second preset condition, and according to the transmit power of the cell and each neighboring cell in the second type of neighboring cells, and the determined The first coverage area or the second coverage area to obtain the coverage area of the cell; For each cell in the second network, sequentially obtain the coverage area of each cell in the second network according to the estimation method of each cell in the first network; For each cell in the first network, according to the coverage area of the cell and the collected time advance statistical data of the cell, the common coverage value between the cell and each covered cell is calculated respectively, specifically including : According to the collected timing advance statistical data of the cell in the first network, the coverage area of the cell is divided into a plurality of sub-areas, and the area of each sub-area is calculated, and each sub-area represents a distance interval corresponding to the timing advance statistical data ; Calculate the traffic distribution weight of each sub-area according to the formula W _i =all user sampling points in each sub-area/all user sampling points in the coverage area of this cell, where W _i is the traffic distribution weight of each sub-area; Calculate the coverage area of each coverage cell and the overlapping area of each sub-area in the coverage area of the cell, and use the following formula to calculate the common coverage value between the cell and each coverage cell: $\mathrm{<span\; class="notranslate">\; C</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\frac{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; r</span>}\mathrm{<span\; class="notranslate">\; e</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ,</span>{\mathrm{<span\; class="notranslate">\; B</span>}}_{\mathrm{<span\; class="notranslate">\; the\; y</span>}}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; A</span>}\mathrm{<span\; class="notranslate">\; r</span>}\mathrm{<span\; class="notranslate">\; e</span>}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; S</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; W</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; ,</span>$ Wherein, C(A _x , B _y ) is the common coverage value between the cell A _x and each covered cell B _y ; Area(S _i , B _y ) is the area of the overlapping area between the coverage area of each coverage cell B _y and each sub-area S _i in the coverage area of the cell A _x ; Area(S _i ) is the area of each sub-area S _i in the coverage area of the cell A _x . 2. The method according to claim 1, wherein the first preset condition is realized in the following manner: For each cell in the first network, select the cell corresponding to the antenna azimuth angle with the smallest angle formed by the antenna azimuth angle of the cell in the clockwise and counterclockwise directions from the cells that share the base station with the cell , and take it as the first type of neighboring cell of the cell. 3. The method according to claim 2, wherein the second coverage of the cell is obtained according to the antenna azimuth angle between the cell and each neighboring cell in the first type of neighboring cell and the first coverage area areas, including: Taking the location of the antenna of the cell as the endpoint, determine the first ray and the second ray along the direction of the angle bisector of the angle between the antenna azimuth angle between the cell and each adjacent cell of the first type, respectively; Using the fan-shaped area formed by the first ray, the second ray, and the first coverage area as the second coverage area of the cell, the fan-shaped area includes the ray along the antenna azimuth direction of the cell Area. 4. The method according to claim 1, wherein the second preset condition is realized in the following manner: For each cell in the first network, calculate the distance and the sum of the coverage radius between the cell and the base station of each cell in the cell set not sharing the base station with the cell; From the set of cells that do not share a base station with the cell, select a cell whose distance from the base station to which the cell belongs is smaller than the sum of coverage radii of the cell, and use it as the second type of neighboring cell of the cell. 5. The method according to claim 4, characterized in that, according to the transmission power of the cell and each neighboring cell in the second type of neighboring cells, and the first coverage area or the second coverage area, Obtain the coverage area of the cell, including: For each cell in the first network, on the connection line between the cell and the antenna position of each adjacent cell in the second type of adjacent cell, according to the cell and each adjacent cell in the second type of adjacent cell The transmission power of the area, calculate the point where the received signal strength of the terminal on each connection is equal, and make the vertical line of the connection line passing through this point; If each vertical line intersects with the first coverage area or the second coverage area, the area formed by each vertical line with the first coverage area or the second coverage area and close to the antenna position of the cell , as the coverage area of the cell. 6. A device for determining cell pairs covering a common area in different networks, characterized in that it comprises: The coverage area estimation module is used to estimate the coverage area of each cell in the first network and the second network respectively according to the basic information of each cell in the first network and the second network stored in the basic information storage module, the basic information includes the first location information, antenna azimuth and transmit power of each cell in the first network and the second network; The common coverage degree value calculation module is used to calculate the coverage area of the cell and the time advance statistical data of the cell collected by the data collection module for each cell in the first network, respectively calculate the value of the cell and each coverage cell The common coverage value between each coverage cell is a cell in the second network that overlaps with the coverage area of the cell; An output module, configured to form a cell pair covering a common area with the cell in the first network with the calculated coverage cell having the largest common coverage value and output it; The estimation module is specifically used for: For each cell in the first network, the coverage radius of the cell is determined according to the corresponding relationship between the transmit power of the cell and the coverage radius, and the location of the antenna of the cell is taken as the center of the circle and the coverage radius is used as the radius. The formed circular area is estimated to be the first coverage area of the cell; if there is a cell that shares the base station with the cell, the first type of the cell is determined from the cells that share the base station with the cell according to the first preset condition neighbor cell, and according to the antenna azimuth angle of the cell and each neighbor cell in the first type of neighbor cell and the first coverage area, obtain the second coverage area of the cell; Concentrating, determining the second type of neighboring cells of the cell according to the second preset condition, and according to the transmission power of the cell and each neighboring cell in the second type of neighboring cells, and the first coverage area or the first coverage area or the second type of neighboring cells Two coverage area, obtain the coverage area of this sub-district; For each sub-district in the second network, obtain the coverage area of each sub-district in the second network successively according to the estimation mode of each sub-district in the first network; The common coverage calculation module is specifically used for: According to the collected timing advance statistical data of the cell in the first network, the coverage area of the cell is divided into a plurality of sub-areas, and the area of each sub-area is calculated, and each sub-area represents a distance interval corresponding to the timing advance statistical data ; Calculate the traffic distribution weight of each sub-area according to the formula W _i =all user sampling points in each sub-area/all user sampling points in the coverage area of this sub-area, wherein W _i is the traffic distribution weight of each sub-area; Calculation The area of overlap between the coverage area of each coverage cell and each sub-area in the coverage area of that cell, and using the formula Among them, C(A _x ,B _y ) is the common coverage value between the cell A _x and each coverage cell B _y ; Area(S _i ,B _y ) is the coverage area of each coverage cell B _y and the coverage area of the cell B y The area of the overlapping area of each sub-area S _i in the coverage area of the cell A _x ; Area(S _i ) is the area of each sub-area S _i in the coverage area of the cell A _x . 7. The device according to claim 6, wherein the estimating module is specifically configured to, for each cell in the first network, select the antenna azimuth of the cell from the cells that share a base station with the cell The cell corresponding to the antenna azimuth angle whose included angle is the smallest in the clockwise and counterclockwise directions is taken as the first type of neighboring cell of the cell. 8. The device according to claim 7, wherein the estimating module is specifically configured to take the location of the antenna of the cell as the endpoint, and respectively follow the cell and the antenna of each neighboring cell in the first type of neighboring cell. The direction of the angle bisector of the included angle of the azimuth determines the first ray and the second ray; the fan-shaped area formed by the first ray, the second ray, and the first coverage area is used as the second ray of the cell Covering area, the fan-shaped area is an area including a ray made along the antenna azimuth direction of the cell. 9. The device according to claim 6, wherein the estimating module is specifically configured to, for each cell in the first network, separately calculate the value of the cell and each cell in the set of cells that do not share a base station with the cell The distance between the base stations to which the cell belongs and the sum of the coverage radius; from the set of cells that are not shared with the base station of the cell, select the cell whose distance from the base station to which the cell belongs is smaller than the sum of the coverage radius of the cell and use it as The second type of neighbors of the cell. 10. The device according to claim 9, wherein the estimation module is specifically configured to, for each cell in the first network, the difference between the cell and each neighboring cell in the second type of neighboring cell On the connection line where the antenna is located, according to the transmission power of the cell and each neighboring cell in the second type of neighboring cells, calculate the point where the received signal strength of the terminal on each connection is equal, and pass through the connection line where the point is located vertical lines; if each vertical line intersects with the first coverage area or the second coverage area, an antenna close to the cell formed by each vertical line with the first coverage area or the second coverage area The area of the location is used as the coverage area of the cell.